{
  "manageEntity": {
    "action": "Save",
    "entityId": "85909090",
    "entityType": "Track",
    "nonce": "0x68ad7818f971f30d5e54abb84bf633dce0e3f86b7af2bac3bf3e93c2f3d6f5cb",
    "signature": "0x5e1e006ea30468d0cdf6392981b5520cf5cbec18cb9a09e4738314ca5150bccf6b1b6cec4d79690cd87bb171b9d49536448ec0fc6f9f111e738010e03054136a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}